Through the analysis, we detect all the active substances (whether they are adulterants such as caffeine, paracetamol, procaine...and/or synthetic by-products).
If none of these appears, the remaining % is usually non-active impurities, which we cannot detect with our analysis techniques. It may also contain some diluents: non-active substances, such as salts, sugars or other materials, but which not suppose an increment of risk.
Your sample also contains an unknown substance. This substance doesn't appear in any of our libraries of more than 200.000 substances, so effects and risks are unknown.
It's not necessary to repeat the analysis because we have not been able to identify this substance.